ABC (Aus) News has an interesting article on how Large Power Batteries (in this case Tesla) can change power generation strategy - http://www.abc.net.au/news/2018-04-06/tesla-battery-outperforms-coal-and-gas/9625726

That response time to handle load-loss as FCAS suppler and being able to make money on buy-low, sell high is Impressive.

How Elon Musk's big Tesla battery is changing Australia's power landscape

The results are in: Tesla's giant battery is responding faster and more precisely than traditional coal and gas generators to stabilise the national energy grid, according to a new report.

@bcshort In California one has been able to make a profit for years hooking batteries to the grid and charging at night to sell back in the day. Of course, as a residential user the power company won't actually pay you if you net to less than zero, but they do net it over the span of a year if I'm not mistaken. At least they only send you the "true up" bill once a year.
@bcshort Thinking about getting a Powerwall in addition to my Tesla roof since I feel kinda bad about contributing to the duck curve, and it'll make it more likely I'll be able to still net to zero despite running a server farm at home.
@seanl Having just bought my home, one of the things on my list is Solar + Powerwall. Just a little bit broke right now to install it!
Where I live in Australia, almost all our power comes from Hydro & wind generation, so it's "clean" energy, but it is also expensive - hence self-generation could save me a bit :)
@seanl yep, "GridConnect" is a pretty common thing here as well in a residential capacity.
Power companies here have been pretty anti-gridconnect since mass adoption as it creates inconsistent power demand that generators need to respond to if solar generation suddenly drops (say due to cloud).